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Microchip Technology 1N5353/TR12
- Part No.:
- 1N5353/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5353/TR12.pdf
- Description:
- DIODE ZENER 16V 5W T18
- Quantity:
- Payment:
- Shipping:
Inventory:4,837
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Product details
Overview
1N5353/TR12 from Microsemi is a 5 W axial-leaded silicon Zener diode with a nominal regulation voltage of 16 V, ±5% tolerance (B-suffix), 2.5 Ω dynamic impedance at 75 mA test current, and maximum reverse current of 1.0 μA at 11.5 V. It operates from –65°C to +150°C and is used for precision voltage reference and overvoltage protection in power supply feedback loops.
For engineers reviewing the 1N5353/TR12 datasheet, 1N5353/TR12 pinout, 1N5353/TR12 application, or 1N5353/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (25 °C/W junction-to-lead), surge current rating (6.0 A), voltage regulation (ΔVZ = 0.30 V), and RoHS-compliant tape-and-reel packaging (TR12 suffix).
Technical Context
The 1N5353/TR12 functions as a two-terminal voltage regulator diode operating in reverse breakdown mode. Its Zener voltage is specified at 75 mA test current (IZT) with 2.5 Ω dynamic impedance (ZZ), and it maintains regulation across 10–50% of IZM (6.0 A), yielding ΔVZ = 0.30 V.
It features low thermal resistance (25 °C/W junction-to-lead at 10 mm lead length), enabling stable operation at up to 5 W steady-state dissipation when adequately heat sunk. The device uses a void-free thermosetting epoxy case (UL94V-0) with cathode band polarity marking and matte-tin-plated leads compliant with MIL-STD-750 Method 2026.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 16 V ±5% - precise regulation point for feedback networks requiring tight voltage reference stability |
| Test Current (IZT) | 75 mA - defined operating point where VZ and ZZ are guaranteed per JEDEC standard |
| Dynamic Impedance (ZZ) | 2.5 Ω - low AC resistance ensures minimal output voltage variation under load transients |
| Max Reverse Current (IR) | 1.0 μA @ 11.5 V - confirms sharp knee and low leakage below regulation threshold |
| Max Regulator Current (IZM) | 6.0 A - peak DC current capability when mounted with 3/8″ lead length and adequate heatsinking |
| Surge Current (IZSM) | 6.0 A - non-recurrent 8.3 ms half-sine pulse handling for transient overvoltage suppression |
| Voltage Regulation (ΔVZ) | 0.30 V - difference between VZ measured at 10% and 50% of IZM, indicating regulation linearity |
Pinout & Package
Package: Axial-leaded T-18 plastic case (JEDEC DO-201AD), void-free UL94V-0 epoxy body, cathode indicated by color band. Leads are annealed matte-tin plated, solderable per MIL-STD-750 Method 2026. Weight: 0.7 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to circuit common; reverse-biased operation requires cathode at higher potential |
| Cathode | Regulated output node | Banded end; held at stable 16 V relative to anode during breakdown conduction |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with industry-standard DO-201AD mechanical and electrical definitions for interchangeability |
| Moisture Sensitivity Level 1 | No dry pack required - simplifies SMT reflow prep and reduces handling overhead |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in assembly |
| RoHS-compliant (e3) | Lead-free matte-tin plating meets EU Directive 2011/65/EU without performance trade-offs |
| Tape-and-reel packaging (TR12) | Standard EIA-296 format - enables automated pick-and-place for high-volume production |
Applications
| Switch-Mode Power Supply Feedback | Industrial Sensor Reference |
|---|---|
Use Scenario: Provides stable 16 V reference in optocoupler-coupled feedback loop of isolated DC-DC converters. IC Role / Device Role / Timing Role: Zener diode acting as precision shunt voltage reference for TL431 or similar error amplifier biasing. Use Value: Tight ±5% tolerance and low ΔVZ (0.30 V) ensure consistent regulation across line/load variations and temperature drift. | Use Scenario: Supplies calibrated excitation voltage to resistive bridge sensors in process control transmitters. IC Role / Device Role / Timing Role: Shunt regulator establishing fixed 16 V rail for ratiometric ADC reference and sensor biasing. Use Value: Low IR (1.0 μA @ 11.5 V) and high IZM (6.0 A) support stable biasing under varying sensor loading and transient surges. |
| Overvoltage Clamp Protection | Programmable Voltage Monitor |
Use Scenario: Clamps transient spikes on 12 V automotive subsystem rails to prevent downstream IC damage. IC Role / Device Role / Timing Role: Two-terminal shunt protector triggered above 16 V, diverting surge current away from sensitive loads. Use Value: 6.0 A surge rating (8.3 ms half-sine) and robust epoxy package withstand repeated 100 V/100 ns transients per ISO 7637-2. | Use Scenario: Sets trip threshold for discrete comparator-based brown-out detection in embedded controllers. IC Role / Device Role / Timing Role: Precision voltage reference input to LM393 comparator, defining 16 V undervoltage lockout point. Use Value: 2.5 Ω ZZ ensures minimal hysteresis shift with supply ripple, improving detection repeatability across temperature. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5353B | Same 16 V ±5%, identical electrical specs, but in bulk (non-tape-and-reel) packaging | Lacks TR12 tape-and-reel - unsuitable for automated SMT assembly | Select 1N5353/TR12 for volume production; choose 1N5353B only for prototyping or hand-soldered builds |
| MMSZ5245B-TP | Surface-mount SOD-123 package, 16 V ±5%, 500 mW rating, 15 Ω ZZ - lower power, higher impedance | Not drop-in replaceable; requires PCB redesign and derating for 5 W thermal management | Use MMSZ5245B-TP only in space-constrained, low-power designs where 5 W dissipation is unnecessary |
Compared with 1N5353/TR12, 1N5353B offers identical regulation performance but no automated assembly support, while MMSZ5245B-TP trades power handling and impedance for miniaturization - making 1N5353/TR12 optimal for high-reliability, high-power axial-leaded applications requiring tape-and-reel logistics.
Availability
1N5353/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive subsystem protection, and precision sensor reference circuits requiring stable component supply and long-term obsolescence management.
Supply support for 1N5353/TR12 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing components for aerospace, defense, and industrial markets.
The 1N53xxB series was designed specifically for ruggedized 5 W axial Zener regulation in harsh-environment power systems where thermal stability, surge resilience, and JEDEC-standard interchangeability are critical.
FAQ
What is the Zener voltage tolerance of the 1N5353/TR12?
The 1N5353/TR12 has a Zener voltage tolerance of ±5%, confirmed by its "B" suffix per Microsemi's documentation. This means its regulated voltage falls within 15.2 V to 16.8 V at 75 mA test current and 25°C lead temperature. The 1N5353/TR12 achieves this tolerance via factory-trimmed diffusion processes and is JEDEC-registered for cross-manufacturer compatibility.
Does the 1N5353/TR12 require dry packing before reflow soldering?
No, the 1N5353/TR12 does not require dry packing prior to reflow soldering. It carries Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it is not moisture-sensitive and may be stored and processed in ambient conditions without baking. This eliminates pre-reflow bake steps and reduces manufacturing overhead for the 1N5353/TR12 in high-volume assembly lines.
What is the maximum power dissipation of the 1N5353/TR12 at room temperature?
The 1N5353/TR12 is rated for 5.0 W steady-state power dissipation at 25°C lead temperature (TL), provided leads are trimmed to 3/8″ (10 mm) length from the body. When mounted on FR4 with 1 oz copper, its derated power drops to 1.47 W at 25°C ambient (TA). Thermal resistance is 25 °C/W junction-to-lead - a key design parameter for heatsink sizing in the 1N5353/TR12's application.
How is polarity marked on the 1N5353/TR12?
The 1N5353/TR12 uses a cathode band - a single colored ring near one end of the axial package - to indicate the cathode terminal. The banded end must be held at a higher potential than the opposite (anode) end for proper Zener operation. This marking complies with JEDEC DO-201AD standards and is visible without magnification, ensuring correct orientation during manual or automated placement of the 1N5353/TR12.
Is the 1N5353/TR12 RoHS compliant?
Yes, the 1N5353/TR12 is RoHS compliant, as indicated by the "e3" suffix in its full manufacturer designation (1N5353B e3). It features annealed matte-tin-plated leads and meets EU Directive 2011/65/EU requirements. The 1N5353/TR12 contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits, and its UL94V-0 epoxy body is halogen-free per Microsemi's compliance documentation.
1N5353/TR12 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 16 V
- Tolerance:
- ±20%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 11.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-18
1N5353/TR12 FAQ
1.How can I place an order for 1N5353/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5353/TR12 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for 1N5353/TR12 reliable?
The price and inventory of 1N5353/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5353/TR12 is usually 5 days.
3.What payment methods are accepted for 1N5353/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5353/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5353/TR12?
1N5353/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5353/TR12 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for 1N5353/TR12?
For technical support, including 1N5353/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5353/TR12 requirements.
6.How does Aetrix verify that 1N5353/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N5353/TR12 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 1N5353/TR12 meets industry standards.
7.What is the process for return or replacement of 1N5353/TR12?
All 1N5353/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N5353/TR12, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The 1N5353/TR12 part is unused and in its original packaging.
Return procedure for 1N5353/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5353/TR12 Tags
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